Teic light



(No Model.)

J. R. PINNEY.

ELECTRIG ARC LAMP.

y wmluesseg Patented Jan. 30, 1888.

N. PETERSv Pnomuiho m her, Wzuhmgmn. 01c.

UNITED STATES PATENT OEEIcE.

JOSEPH R. FINNEY, OF PlTTSBURG, IA., ASSIGNOR TO THE FINNEY ELEG- TRIGLIGHT 8t TELEGRAPH COMPANY, (LIMITED,) OF SAME PLACE.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 271,576, dated January30, 1883.

Application filed November 8, 1882. (No model.)

To all whom it may concern:

Be it known that I, JOSEPH R. FINNEY, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Electric Arc Lamps; and I do hereby declare the followingto be a full, clear, and exact description thereof, reference being hadto the accompanying drawings, forming a part of this specification,

To in which- Figure 1 is an elevation of my improved electric-arc lamp.Fig. 2 is a sectional view ofthe feeding device. Fig. 3 is a perspectiveview of the armature which sustains the carbon feed-rod. Figs. 4 and 5are sectional views of the same.

Like letters of reference indicate like parts in each.

The frame of the lamp is composed of crossheads a a and side rods, 1) b,all made ot'conducting material. They are secured together by nuts 0.The cross-head a is insulated from the rods 7) I) and nuts 0 bynon-conducting collars d (1, having flanges which extend under the nuts.Secured to the insulator d is a ring, 0, of conducting material. 011 thecrosshead ais an electro-magnet, f, the coils of which are formed of oneof the circuit-wires, p. The core g is hollow and lined with a brasstube, 0 It, so as to permit the feed-rod t'to slide freely through it.Fastened to the under side oi'the cross-head a is a step or stirrup, it,which extends close to or around the rod 4)., 1n thelatter case it has ahole, 70, for the passage otthe rod. It has a pin, 75. which acts as afulcrum and guide for the armature. The armature l is secured to aplate,wt, preferably of brass, the ends of which are longer than the armatureand bent at an angle thereto. The upper 0 end, m, has an oblong slot orhole, m and the end m a hole, at, which is somewhat larger than thediameter of the rod. The point of the end m is notched, as at hi toreceive the pin W. The feed-rodi is passed up through 5 the holes in mand the tube It and the point of the plate m rested against the pin 70on the support 70. Thus arranged, the position ofthe armature is at theside of the feed-rod and beyond the vertical plane of the core 1 of themagnet, so that the attraction of the core shall cause it to be drawninward radially until the plate m grasps the rod, and then vertically;but the presence of the feed-rod t prevents the armature from cominginto coincidence with the vertical plane of the core, and so theattraction is exerted on the armature inwardly, even when it is at thehighest pointofits movement. The circuit-wire p is connected to the ring0 and the wire a to the ring a. The wire 19, forming the coils of themagnet f, is connected to the ring a. The carbons 0 and 0' are securedin sockets f and a The circuit is by wire 1), ring 0, wire 1), magnetf,rod 2', carbons o 0, cross-head a, side rod, b, and wire 'n. Then thecore 9 becomes magnetized it draws the upper end of the armature linward by a radial movement, the point of the plate at being the center,until the sides of the hole on bite on the rod This movementispermittedby the slot m in the upper end, m, which is provided only to keep thearmature in place. Then the attraction of th emagnet gives the armatureand the rod 43 an upward axial movement, which effects the separation ofthe carbons for the purpose of establishing the arc.

When this feeding device is used withlamps having devices at the lowerholder for separating the carbons to establish the arc-as, for instance,in my Patent No. 268,394-the armature need have the radial movementonly, as its whole function would then he to grasp and release the rodalternately.

\Vhat I claim as myinvention, and desire to secure by Letters Patent,is-

1. The combination,in an electric-arclamp,

of a hollow electro-magnet, through which the teed-rod passes, a pivotedarmature arranged at the side of the feed-rod, and a perforated plate orring attached diagonally to the armature and encircling the feed-rod,substantially as and for the purposes described.

2. The combination, in an electric-arc lamp, of an electro-magnet, afeed-rod, a pivoted armature arranged at the side of the feed-rod andbeyond the vertical plane of the core of the magnet, and a perforatedplate or ring attached diagonally to the armature and encircling thefeed-rod, substantially as and for the purposes described.

3. The combination, in an electric-arc lamp, of an electro-magnet, anarmature capable of an axial movement, and having a slotted projeclionto encircle the feed-rod to keep it from pin to guide the armature inits movements, 10 falling, and a circular clamp to grasp thefeedsubstantially as andfor the purposes described. rod, and a stirrupor support to sustain the In testimony whereof I have hereunto set myarmature, substantially as and for the purhand this 28th day of OctoberA. D. 1882. poses described.

4. The combination, in an electric-arc lamp, JOSEPH FINNEY' of anelectro-inagnet, an armature capable of \Yitnesses: u a radial and anaxial movement, and a stirrup I XV. B. OORWIN, or support for thearmature, having; a guide- I T. B. KERR.

